Additional Features
The ACM allows for general and special rates to be calculated so that for particular areas, the rate is based on the costs of projects located in that rate area. Currently there are rates for:
Neuse River basin (eight-digit HUCs 03020202, 03020203, 03020204).
Tar-Pamlico River basin (eight-digit HUCs 03020101, 03020102, 03020103, 03020104).
Falls Lake watershed (a portion of Neuse 03020201).
Jordan Lake watershed.
Neuse 03020201 exclusive of Falls Lake.
The rules require that rates be evaluated using the ACM at least annually, with more frequent, quarterly adjustments if program costs increase more than 10 percent. In new rate areas where there are no nutrient-reduction projects, the highest program rate is used until two projects are available for use in determining the rate for that area.